Retrieving the whole history

[jtpio]

At the moment xeus defaults to 10 entries for the history when n is not specified: https://github.com/QuantStack/xeus/blob/871cfd3993b63b725ef98a0a597ce534ac05e387/src/xhistory_manager.cpp#L40

To get the whole history at once, clients can pass a very high number, such as 10000, assuming the history has less than 10000 entries.

But when that number is bigger than what can fit in an int, it defaults to 0. Maybe n could in that case default to the size of the history?

[jtpio]

An alternative way to get the whole history is to let the client do the paging itself, using range as hist_access_type and asking for 1000 entries at a time (for example).